How 'Positive Train Control' Works

Tom Foreman explores whether PTC technology could have prevented the Amtrak derailment.

CNN Money
May 15, 2015
Latest in Operations
Security Breach Podcast
Sponsored
Security Breach Podcast
August 7, 2025
A vehicle assembly technician works on a 2025 Ford Expedition during a media tour to launch the 2025 Ford Expedition at the Ford Motor Company Kentucky Truck Plant, April 30, 2025, in Louisville, Ky.
Ford to Invest Nearly $2 Billion in Kentucky Assembly Plant to Produce EVs
August 11, 2025
Tendeg’s new 120,000 square feet facility.
Tendeg Completes Construction of Antenna Manufacturing Facility
August 11, 2025
Amazon Web Services data center is visible on Aug. 22, 2024, in Boardman, Ore.
As Electric Bills Rise, Evidence Mounts That Data Centers Share Blame
August 11, 2025
Related Stories
Mnet 143951 Georgiapacificgraphiclead
Operations
Georgia-Pacific Professional and CloudClean Collaborate to Improve Hand Hygiene in Foodservice, Food Processing Industries
Mnet 143924 Jenisicecreamlead 2
Operations
Jeni's Resumes Ice-Cream Making After Cleaning Since Recall
Mnet 143933 Milk Picture Lead 2
Operations
Study: California Dairy Industry Contributes $21 Billion To State's Economy, Stimulates Ripple Effect Of $65 Billion
Security Breach Podcast
Sponsor Content
Security Breach Podcast
More in Operations
Accounting for Manufacturing Companies
Sponsored
Accounting for Manufacturing Companies
Is your manufacturing or distribution business in need of financial guidance? Our top-50 CPA firm specializes in audit, tax, and strategic consulting to help businesses like yours streamline operations and maximize profitability.
August 7, 2025
A vehicle assembly technician works on a 2025 Ford Expedition during a media tour to launch the 2025 Ford Expedition at the Ford Motor Company Kentucky Truck Plant, April 30, 2025, in Louisville, Ky.
Operations
Ford to Invest Nearly $2 Billion in Kentucky Assembly Plant to Produce EVs
How Ford is revolutionizing EV production in Kentucky.
August 11, 2025
Tendeg’s new 120,000 square feet facility.
Operations
Tendeg Completes Construction of Antenna Manufacturing Facility
The facility is purpose built to scale the production of spacecraft apertures.
August 11, 2025
Amazon Web Services data center is visible on Aug. 22, 2024, in Boardman, Ore.
Operations
As Electric Bills Rise, Evidence Mounts That Data Centers Share Blame
And states are feeling pressure to act.
August 11, 2025
Intel research and development office in Matam business park in Haifa.
Operations
Intel CEO Responds After Trump Calls For His Resignation
Intel remains “deeply committed to advancing U.S. national and economic security interests."
August 8, 2025
Intel CEO Lip-Bu Tan delivers a speech during the Computex 2025 exhibition in Taipei, Taiwan, Monday, May 19, 2025.
Operations
Intel's Stock Tumbles After Trump Says Its CEO Must Resign
Intel has already shed thousands of workers and cut expenses.
August 7, 2025
A logo of Sony is seen at the headquarters of Sony Corp. on May 10, 2022, in Tokyo.
Operations
Sony Raises Profit Forecast After Saying It Expects Less Damage from Tariffs
The company expects its profits and sales to offset the impact from unfavorable exchanges rates.
August 7, 2025
Apple logo on glass facade
Operations
Trump Announces Apple's Plans to Invest $100 Billion More in U.S.
This raises the total to $600 billion.
August 6, 2025
Sentry Equipment Corp 2
Operations
From Family-Owned to Employee-Owned: A Machinery Manufacturer's 100-Year Journey
Sentry Equipment transferred ownership to its employees after 60 years in business.
August 6, 2025
A stock image of green batteries smoking.
Operations
Hemp Battery Factory Plans Go Up in Smoke in Wisconsin
The company and its CEO fell "completely off the radar."
August 5, 2025
Screenshot 2025 08 05 At 10 12 12 Am
Operations
Medical Equipment Maker Mopec Moving California Operations to Michigan
The move will create at least 47 new jobs.
August 5, 2025
Japan’s Maritime Self-Defense Force, JS Kumano, a Mogami-class frigate is seen in Yokosuka, south of Tokyo, on April 23, 2025.
Operations
Australia Selects Japan's Mitsubishi Heavy Industries for $6.5B Warship Deal
It is a lucrative and hotly contested contract.
August 5, 2025
Harley Davidson
Operations
Harley-Davidson Announces Artie Starrs as New CEO, President
Starrs previously held leadership positions at Topgolf and Pizza Hut.
August 4, 2025
Powerise, the new product family of linear actuator systems for industrial applications from Ace Controls.
Operations
Ace Controls Introduces New Actuators for Industrial Applications
Introduction to the Americas follows a successful debut in European markets.
August 4, 2025
USA and Arkansas flags outside Lake Catherine State Park Headquarters.
Operations
Cantex Announces $120 Million Facility in Arkansas
The company expects the location to create 110 jobs.
August 4, 2025